Picamera2 AfWindows

[waikeat2397]

Hi, I am trying on picamera2 AfWindows feature. Found out something weird.
I am using Rapberry Pi Camera Module 3.
Set the sensor mode at (4608, 2592). Trying to set the AfWindows accordingly, it is working fine!

Now I set the sensor mode at (2304, 1296), Trying to set the AfWindows accordingly to the resolution, found out that it is not working as expected. I need to set the AfWindows x and y offset according to full resolution sensor mode. Is this valid?

Below is my sample code.

from picamera2 import Picamera2
import time

picam2 = Picamera2()
camera_config = picam2.create_still_configuration(main={"size": (2304, 1296), 'format': 'BGR888'}, raw={"size": (2304, 1296)})
picam2.configure(camera_config)
picam2.start()
time.sleep(1)
picam2.set_controls({'AeEnable': True})
time.sleep(3)
picam2.set_controls({'AeEnable': False})
#823, 1770, 1028, 517
picam2.set_controls({'AfMetering': controls.AfMeteringEnum.Windows, 'AfWindows': [(823, 1770, 1028, 517)], 'AfMode': controls.AfModeEnum.Auto})
picam2.autofocus_cycle()
print(picam2.capture_metadata()['LensPosition'])
picam2.capture_file('test.jpg')
#1851, 853, 647, 304
picam2.set_controls({'AfMetering': controls.AfMeteringEnum.Windows, 'AfWindows': [(1851, 853, 647, 304)], 'AfMode': controls.AfModeEnum.Auto})
picam2.autofocus_cycle()
print(picam2.capture_metadata()['LensPosition'])
picam2.capture_file('test2.jpg')


picam2.stop()
picam2.close()

[davidplowman]

I think the AF windows are always given in the coordinates of the full sensor resolution. The idea is that you get the same AF behaviour regardless of what mode the camera is actually in. Does this accord with your findings?